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Languages & runtimes · #elixir
Group several Ecto changesets into a single transaction with Ecto.Multi, ensuring all succeed or none happen, while avoiding nested manual rollbacks.
Ecto.Multi composes multiple Repo operations into a single atomic transaction with named steps and explicit dependencies. This guide shows a registration example, explains limits like single-transaction scope and no auto-retry, and covers common mistakes such as nesting or mixing manual Repo calls.
Use a supervised Elixir GenServer to serialize writes to a mutable external resource, with timeouts, input validation, and operational checks.
Ecto.Multi groups multiple Repo operations into a single atomic transaction with explicit success/failure tuples. Learn how to structure multi-step writes, access prior results, and test rollback behavior with Sandbox.
Learn how Ecto Changesets filter input, validate data, and handle database constraints safely in Elixir applications.
Learn how to choose between GenServer.call, cast, and handle_info to build responsive stateful services in Elixir without blocking your event loop.
A diagnostic guide for intermittent GenServer.call timeouts in Elixir, covering caller timeouts, mailbox backlog, blocked callbacks, and escalation criteria.
Ecto.Multi lets you group database ops into a single, atomic transaction. Learn how to declare, execute, test, and debug Multi chains—plus common pitfalls and best‑practice tips.
Task.async_stream caps concurrent work on an enumerable, isolates per-item failures, and preserves order by default. Learn the trade-offs and how to verify behavior in your Elixir version.
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